@article{ref1,
title="Cognitive and psychotic effects after cessation of chronic cannabis use",
journal="Nederlands Tijdschrift voor Geneeskunde",
year="1998",
author="Van Gerven, J. M. and Gijsman, H. J. and Verkes, Robbert-Jan and Cohen, A. F.",
volume="142",
number="18",
pages="1046-1047",
abstract="<p>[Abstract unavailable]</p><p>Language: nl</p>",
language="nl",
issn="0028-2162",
doi="",
url="http://dx.doi.org/"
}